Lock



Nov. 28, 1939. J. H, MILLIGAN 2,181,762

' LocK Filed Nov. 17; Las? :s sheets-sheet 1l l 97,/2 I; V 1.5";25 444/ 9820 I9 2352* I+ 50 I B i 4o 3 Sheets-Sheet 5 MN ww b mv .lY H. MILLIGAN LOCK Filed NOV. 17, 1937 Uoseph H Mll AlTys.

Nov. 28, 1939.

Patented Nov. 28, 1939 UNITED STATES PATENT OFFICE.

LOCK

ton, Mass.

Application November 17, 1937, Serial No. 175,050

21 Claims.

This invention relates to locks for doors and it has for one of its objects to provide a novel lock in which a single locking element functions both as a spring latch and as a locking or dead bolt.

A further object of the invention is to provide a novel lock of this type in which the axial line of the combined latch and locking bolt intersects the axial line of the operating spindle.

A still further object of the invention is to provide a novel lock of this type in which the operative parts are confined within a small compass, thus making it necessary to cut a relatively small cavity in the door to receive the lock.

A still further object of the invention is to provide a novel lock of this type which is jimmy proof.

A still further object of the invention is to provide a lock of this type which can be used equally well forl doors of residences or for automobile doors and in a variety of other places.

Other objects of the invention are to improve generally locks of this invention in the particulars hereinafter set forth.

In the drawings wherein I have illustrated some embodiments of the invention,

Fig. l is a horizontal sectional view through a portion of a door showing my improved lock installed therein;

Fig. 2 is a section on the line 2 2, Fig. 1;

Fig. 3 is a section similar to Fig. 5 but showing the door locked;

Fig. 4 is a section similar to Fig. 2 but showing the door unlocked and the combined latch and locking bolt withdrawn;

Fig. 5 is a section through the combined latch and bolt member on the line 5 5, Fig. 3;

Fig. 6 is a section on the line 6 6, Fig. 4;

Figs. 7 and 8 are sections on the line 'l-l, Fig. 3, showing the safety device in different positions;

Fig. 9 is an inner end view of the locking bolt showing the bolt actuator in section;

Fig. 10 is a fragmentary sectional View illustrating the initial step in withdrawing the lock- 45 'ing bolt from the keeper when the door is to be unlocked;

Fig. 11 is a fragmentary sectional view showing how my improved lock may be applied to an automobile door;

Fig. 12 is a section on the line |2 l2, Fig. 11;

Fig. 13 is a fragmentary sectional view showing the operation of the combined latch and locking member Whenthe door is being closed.

In Figs. l to l0, I indicates the portion of a (Cl. '7G-143) door and 2 is a portion of the door jamb or door frame, the latter having the usual cavity 3 to receive the locking element and also being provided with the usual striker or keeper 4 which is shown as secured to the door jamb by means of suitable screws 5. The combined latch and locking bolt is shown at 6 and it is mounted in a suitable casing or housing 'l which is received in a cavity in the door I provided for that purpose.

8 indicates the knob spindle which extends through the door and which is provided with the knobs 9 and I0. In Fig. 1 the knob 9- is the knob on the inside of the door and is made fast on the spindle 8, while the knob I6 is the outside knob on the outside of the door. Any suitable operating connection between the outside knob I6 and the spindle 8 may be employed, but I prefer to use a key-controlled operating connection such as shown in my co-pending application, Serial No. 84,446, led June 10, 1936, now Patent No. 2,119,866, June '7, 1938. The operating connection shown in said application is such a construction that normally the outside knob is lockedV from turning movement but can be unlocked by the insertion of a key in a suitable key slot formed in the knob. The unlocking of the outer knob by insertion of the key permits it to be turned, and the turning movement thereof is transmitted to the spindle by suitable mechanism. The lock for the outer knob, however, does not interfere with the turning of the spindle at any time by means of the inner knob 9.

The connection between the spindle 8 and the combined latch and locking bolt 6 is such that when the door is swung into a shut position the combined latch and locking bot 6 is free to move backwardly into the door against the action of a spring as it strikes the striker 4 and without giv ing any rotary movement to the spindle 8, said spring thus allowing the door to close, and when the door has been closed said spring operates automatically to throw the bolt 6 forwardly into door-latching position in the opening 32 of the vstriker as shown in Fig. 2, also without giving movement to the spindle 6 or the knob 9.

The operative connection between the spindle 8 and the bolt 6, however, is such that by turning the knob'S in one direction said bolt may be withdrawn from the striker to open the door, and by turning the knob in the other direction the bolt may be thrown forwardly into a locking position in which said bolt becomes a deadlock for locking the door. Furthermore, the bolt is constructed so that when it is in the latter or locking position the lock is practically jimmy proof.

The operative connection between the spindle 8 and the combined latch and locking bolt includes a pinion Il which is fast on the spindle 8 and a rack i2 which is situated within the housing 'l and meshes with the pinion Il. The forward end of the rack I2 is bent downwardly to form a lip i3 which normally engages between a plate I4 at the inner end of the locking bolt 5 and an abutment pin l5 which is carried by said bolt. With this connection the turning of the pinion II clockwise in Fig, 2 will move the rack i2 to the right, and the engagement of the lip I3 against the plate i4 will serve to move the bolt 6 to the right, thus withdrawing it from the` striker 4 as shown in Fig. 4.

The turning of the spindle 8 in a counterclockwise direction, Fig. 2, will move the rack I2 to the left, and the engagement of the lip I3 with the pin i5 will move the bolt forwardly into a position shown in Fig. 3 in which the door is deadlocked. I9 indicates a spring acting on the bolt and tending to move it forwardly. One

.- end of this spring is received in a cavity 2c formed in a bolt t and the other end encircles a guide pin 2l which is anchored in and extends from the housing 22 for the pinion I I.

To provide for backward movement or retracting movement of the bolt 6 against the action of the spring I9 without giving turning movement to the spindle 3 and knob 9 when the bolt 6 functions as a spring latch, I provide means for retracting the pin l5 and moving it inwardly to l.) disengage it from the lip I3 at such time as the end of the bolt engages the striker when the door is swung shut.

The plate I4 above referred to is carried on the end of a pin i8 which is mounted axially in the bolt and is capable of longitudinal movement therein. This pin is cut away on one side at 23 and is formed with the cam surface 2li with which the abutment pin l5 cooperates, said pin being acted on by a spring 25 which tends to move it inwardly. This releasing pin I8 extends through the bolt and the outer end thereof is pivotally connected at 2t to a feeler element 2l which operates in a slot '28 formed in the end of the bolt E and which is acted on by a spring 29 that normally holds it projected somewhat beyond the inclined end face 3Q of the bolt 6, as best seen in Fig. i. When the door is swung shut the inclined face 3i of the feeler 2l' will engage the striker and said feeler will be pushed inwardly into the slot 28 and into a position flush with the face 3i! of the bolt, Such inward movement of the feeler 2l moves the releasing pin I8 inwardly relative to the bolt and brings the pin IS into the position relative to the bolt shown in Fig. 13. As the pin E8 is thus moved toward the right the low portion of the recess 23 is brought underneath the abutment pin i5 and the spring 25 forces said abutment pin inwardly into a position where its end is below the tip of the lip I3. As soon as the abutment pin reaches this position, then the operative connection between the bolt I5 and the neck Il of the rack It is disrupted and the bolt is free to be moved backwardly or inwardly against the action of the spring I9 by the engagement of the inclined face B of the bolt with the striker 4 so as to allow the door to close. As soon as the door is closed the bolt will register with the opening 32 in the striker 4 and the spring i9 will then force the bolt forwardly through said opening 32 and into the latching position shown in Fig. 2. When the bolt comes into register with the opening 32 of the striker the pressure on the feeler 2l' will be relieved and the spring 29 will then tend to force said feeler forwardly to restore the releasing pin I8 to its normal position shown in Fig. 2.

Means are provided, however, to hold the releasing pin in its retracted position until the bolt I5 has completed its forward movement into the latching position shown in Fig. 2 wherein the abutment pin I5 is located immediately in front of the lip I3 of the rack I2. 'I'he bolt E is provided with an auxiliary latch 38, which is used for making the lock jimmy proof as will be presently described, and which operates in a recess 39 extending transversely of said bolt. This auxiliary latch 38 is formed with a stem or body portion 40 which operates in a recess or cut-away portion 9i with which the releasing pin I@ is provided in one side. Said auxiliary latch is also formed on its inner end with a wedge-shaped head 4I and is backed by a suitable spring l2 which tends to throw it outwardly into a vposition projecting beyond the side of the bolt The pin I8 is formed on one side with a V notch 43 of a shape and size to receive the head 4I, and said pin I8 is formed on its opposite side with a second notch 44 that cooperates with a screw-threaded pin 45 carried by the auxiliary latch 38, said notch 44 having a dip or recess 93 in its bottom.

The two notches 43 and 44 are out of line with each other and have such relative positions that when the releasing pin is in its forward position shown in Fig. 2, the notch 43 is in line with the head 4I while when the pin i8 is in its retracted position shown in Fig. 4 the notch 44 is in line with the pin 45.

The housing I is provided with an aperture 99 in which the auxiliary latch 38 is received when the bolt is in its latchin-g position, the engagement of the latch 38 in said aperture normally preventing the bolt from being moved backwardly. When the pin I8 is moved backwardly by reason of the feeler 2l engaging the striker 4, the inclined wall of the notch 43 in said pin will have a camming action on the head 4I and will force the latter backwardly into the position shown in Fig. 13, and this movement of the head 4I will cause the auxiliary latch 38 to be withdrawn from the opening 99 into its recess 39 also as shown in Fig. 10. The bolt 6 is then free to move backwardly and as it moves backwardly the auxiliary latch 38 is held in its depressed position by engagement of the inner wall of the housing l. The auxiliary latch V38 is provided with an inwardly projecting pin 45 which is seated in the bottom of the recess 44 when the auxiliary latch is in its retracted position (see Fig. and so long as the auxiliary latch is thus held retracted the releasing pin I8 will be locked from forward position by the pin 45. The releasing pin will thus be held in its retracted position during the backward movement of the bolt 6 which takes place when the latch engages the striker 4 during the shutting of the door and said pin I8 will also be held in its retracted position until the bolt 6 moves forwardly into its latching position shown in Fig. 2, in which position the auxiliary latch registers with the opening 92B. The abutment pin I5 will be held in its lowered position by the spring 25` during the entire time that the releasing pin is held retracted by the pin 45 of the auxiliary latch and, therefore, the abutment pin yis prevented l from ymoving outwardly into its operative position until after the bolt 6 has ybeen returned to its-latching position, in whichposition the abutment pin will be located immediately in front of the lip I3 so that when the abutment pin resumes its normal position it Will be properly located with reference to the lip I3.

The operative connection between the spindle 8 and the bolt 8 is thus automatically disrupted when said bolt 6 is functioning as a spring latch, and is then automatically re-established again when the bolt 6 springs into the opening 32 of the striker 4.

As stated above, the door is opened by turning the spindle 8 in a clockwise direction to move the rack I2 toward the right, during which movement the lip i3 acts on the plate I4 to pull the bolt inwardly. The pulling action of the lip I3 on the plate i4 will rst move the pin I8 within the bolt i5 for a short distance to bring the pin i8 into the position relative to the bolt shown in Figs. 4 and 10, and during this operation the abutment pin I5 will be moved inwardly by its spring 25. After the releasing pin I8 has been moved into the position relative to the bolt shown in Fig. 4, then further pulling action of the rack l2 and lip I3 on the plate I4 will move the bolt 6 inwardly or to the right, thereby releasing it from the striker 4 so that the door may be opened. During the retracting movement of the bolt 6, and While the rack I2 is applying thereto a force tending to move it to the right, Fig. 4, the releasing pin I8 will have the position shown in Fig. 4 and the abutment pin I5 will be held in its lowered position by its spring 25. In order to maintain the operative connection between the lip I3 of the rack and the bolt it is necessary that the abutment pin I5 should be projected outwardly into the dotted line position, Fig. 4, or the full line position, Fig. 3, as soon as the knob is released so that the lip I3 will maintain its operative `position between the plate I4 and said pin i5.

The housing 'I is provided with an aperture 49 with which the auxiliary latch 38 registers when the bolt is in its retracted position shown in Fig. 4. As soon as the knob is released after having retracted the bolt the spring 29 acting on the feeler 21 immediately throws said feeler and the releasing pin I8 forwardly into the position relative to bolt 8 shown in Figs. 2 and 3, thereby causing the cam surface 24 to act on the abutment pin l5 and move the latterupwardly against the action of its spring 25. As the pin i8 moves forwardly the notch 43 of said pin is brought into register with the tapered head 4I of the auxiliary latch and said latch moves outwardly under the inuence of the spring 42 into the dotted line position, Fig. 4, wherein said latch occupies the opening 49. At this time the lip I3 is closely confined between the plate I4 and the abutment pin l5 and as the bolt B moves forwardly, either under the inuence of the spring i9 or by the turning of the knob to move the rack I2 to the left, the inclined face 46 of the auxiliary latch engages the edge of the opening 48 and the latch is crowded backwardly as the bolt moves into the position shown in Fig. 2. The dip 98 of the notch 44 in the releasing pin permits this retracting movement of the auxiliary latch 38 while the bolt is moving from the position shown in Fig. 13 to that shown in Fig. 2 without causing any backward movement of the pin I8.

An additional spring 33 is employed to assist l the housing l.

the return of the spindle 8 and knob 9 to its initial position when the knob has been released. This additional spring 33 is conned between a driver 34 at the inner end of the housing 'I and a member 35 which is slidably mounted within the housing and is provided with an abutment 38 against which the end of the rack I2 is adapted to abut. This member 35 is shown as having a recess 37 in which the inner end of the spring 33 is received. When the knob is turned to withdraw the combined latch and bolt 6 from the striker as shown in Fig. 4, the engagement of the end of the rack I2 with the abutment 36 forces the member 35 backwardly within the housing against the action of 4the spring 33, as shown in Fig. 4, and When the knob is released the expanding of the two springs I9 and 33 serve to move the bolt 8 forward and to bring the rack l2, spindle 8 and knob 9 back into their initial position.

The auxiliary latch 38 above referred to serves to render the lock jimmy proof by preventing the bolt from Ibeing withdrawn from the striker by the use of a jimmy when said bolt is in the deadlocking position shown in Fig. 3.

When the releasing pin I8 is in its forward position, as shown in Figs. 2 and 3, the spring 42 Will forceV the auxiliary latch 38 outwardly and will bring the head 4l into the notch 43. When the releasing pin I8 is moved to the right into the position shown in Figs. 4 and 10, then one side of the notch 43 comes against the wedgeshaped head 4l and forces said head downwardly against the action of the spring 42 thereby Withdrawing the auxiliary latch 38.

The outer face '28 of the auxiliary latch 38 is beveled or inclined and when the bolt 6 is in its latching position shown in Fig. 2 the auxiliary latch 38 occupies an opening 98 in the housing and the inclined face 46 of said latch rests against the inclined face 4l of the head 48 of The auxiliary latch 38 thus prevents the bolt from being pushed inwardly by application of force directly to its beveled end face 38. from the latching position to the locking'position the engagement of the inclined face 46 of the auxiliary latch with the inclined face 47 of the head i8 will force the auxiliary latch inwardly thereby allowing it to pass through the head i8 and through the opening 32 in the striker 4. As soon as the 'bolt li reaches the locking position shown in Fig. 3 the auxiliary latch 38 is moved outwardly behind the striker by the spring 42.

This auxiliary latch thus locks the bolt in the striker and prevents it from being Withdrawn by the insertion of a jimmy between the door and the striker. When the door is to be unlocked the knob is turned to turn the spindle 8 clockwise in Fig. 3, and the initial movement to the right which is given to the rack I2 will move the head I4 backwardly from the bolt and thus move the releasing pin i8 backwardly as shown in Fig. l0. This movement of the releasing pin operates through the inclined face of the notch 43 and the inclined face of the head 4i to withdraw the auxiliary latch 38 as shown in Fig. l0, thus unlocking the bolt so that it can be withdrawn from the striker.

When the door is open the bolt S normally occupies the position shown in Fig. l, which is the latching position shown in Fig. 2. When the bolt is in this position the auxiliary latch 33 occupies the opening 98 and the engagement of said latch with the rear wall of the opening prevents the When the bolt G is moved forwardly rio" bolt .from being pushed Yinwardly by the application Iof pressure kdirectly to the beveled end face 3E thereof. If, however, pressure is applied to the ieeler 2'! and the latter is pushed inwardly this will result in moving the releasing pin i3 backwardly relative to the bolt E into the position shown in Fig. 4, and during such backward movement of the releasing pin i8 the inclined face of the notch i3 wil have a camming action against the head 1li thereby retracting the auxiliary latch and thus unlocking the bolt so that it can be pushed inwardly into the door. This same backward movement of the releasing pin i8 removes the cam face '24 from the inner end of the abutment pin i5 so that `said pin moves inwardly under the influence of ,the spring 25. Continued manual pressure on the feeler 2l .will then move the bolt ES inwardly without giving movement to the rack E2, the depressed abutment pin l5 during such movement passing under the lip i3 of the rack I2.

I have provided herein means whereby if this occurs the operative relation between the bolt and the rack i2 will not be lost.

The bolt 6 has a stop pin 5S projecting from its inner or rear end and there is provided a stop member 5i which is normaly located in a position to be engaged by the stop 50. This stop pin 5i) is of such a length that when the stop member 5l occupies its normal position shown in Fig. F7 said stop pin 5t will engage the stop 5i before the bolt has been retracted suiiiciently to bring the auxiliary latch 35 into register with the opening 69. The auxiliary latch is, therefore, held in its retracted position by the housing l, and, when in such retracted position, the pin :i5 engages in the notch lill and thus holds the releasing pin I 8 in its retracted position (see Fig. 13). The releasing pin I8 will be held in this position by the engagement of the pin t5 of the auxiliary latch in the notch d4 since said auxiliary latch is held in its retracted position by the housing l. When the pressure on the ieeler 2l is released the bolt will move forward under the influence of the spring i9, but the releasing pin i8 will still be held in its retracted position until the releasing latch comes into register with the opening 95, at which time the spring :l2 throws the auxiliary latch outwardly, thas allowing the spring 29 to move the feeler and the releasing pin lil back to their normal positions. This return of the releasing pin l to normal position will operate through the cam 2li to force the abutment pin outwardly into its operative position, but at this time the bolt has reached such a position relative to the rack that the abutment pin will assume its operative position on the opposite side of the lip I3 from the plate ld. l

The stop 5i, however, isa movable stop, and while it is normally in position to be engaged by the stop pin 50, yet when the rack is moved by manipulating the knob, the stop 5i will be withdrawn from a position in which it will be engaged by the stop pin 5l). This stop 5i is pivotally mounted at 52 and is acted on by a spring 53 (see Figs. 'l and 8) tending to move it counterclockwise. When the rack l2 is in its normal position shown in Fig. 2 the upper end of the stop 5l engages the side of the rack and is held in its operative position shown in Fig. '7, in which position it is located in the path of movement of the stop pin 55, the latter being shown by' dotted lines in Fig. 7.

When the rack is moved backwardly by the knob in order to withdraw the bolt, then as soon as the toothed part ofthe rack moves to the rear of thestop 5i and .the neck `Il' Aof the rack member =comes over the stop, :said stop will Vbe thrown forwardly .by the vspring 53 into the position shown in Fig. 8 and outofthe path Lof movement of .the stop vpin 5d. When the stop 5i is in this position then the `bolt can be moved backwardly a sumcient distance to bring the auxiliary latch .38 into ,register with .the opening 49. 54 represents a rest or stop projection which limits the springimpelled movement of the `stop member 5l. V/'hen the rack is returned .toits normal position shown in Fig. 2 the end tooth oi the rack has ar camming action against the end of -the stop 5I and thereby vmoves it .backwardly into the position shown in Fig. 7. indicates a yielding stop (see Fig. l) having a rounded endand which operates in a recess S5 in the bolt, said stop being acted on by a spring 95. This normally operates ina slot t@ formed in the housing 'l and its puro pose is to limit the spring-pressed outward movement yoi the bolt 5 due Vto kthe .expansive action of the spring i'. When 'the bolt (i is in its latching position .shown in Figs. l and 2, vthe stop 97 engages the outer end wall of the slot 943 and thus restrains the bolt from further outward movement.

` Although this stop @l .normally holds the latch from moving outwardly beyond the latching position shown in Figs. 1 and 2, yet ii outward pressure is applied to the bolt through the rack i2 by turning the knob, the stop Gl will yield backwardly against the action of the yspring 95,'thus permitting the bolt to be .moved forwardly into its deadlocking position shown in Fig. 3.

93 indicates `a pin extending outwardly from the bolt and operating in a guiding'slot 92 formed in the housing, lthe purpose of this pin being to prevent the bolt from having any turning movement about its axis. Y

In ythe above-described embodiments of the inventionthe inner and outer knob are axially arranged and the axis of movement of both knobs intersects the axial line of `the bolt. In Fig. l1 I have lshown an embodiment of the Vinvention where the inner and outer knobs may be placed out of axial alignment. This yconstruction is well adapted for use as a lock for an automobile door or for other locations where it is ydesirable to have the inside knob and outside vknob operating on In Fig. 11 the housing 7, the

different axes. bolt 'f3 operating therein, the spindle 8 having the pinion il which meshes with the teeth vof the rackr i2, and the connection between the rack l2@ and the bolt 5 are the same as described 1 with reference to Figs. l to 110.v In this embodiment of `the invention, however, the rack l2a has a rear extension bili? provided with rack teeth 55 that mesh with a pinion '55 carried -in a suitable bracket or support 5l. The pinion 56 is shown as meshing with another pinion 58 fast on a shaft 55 carried by said bracket 5l, and said shaft 59 carries a sprocket wheel dll which is connected by a sprocket chain Si to a second sprocket wheel handle on the outside. of the door willpreferably 75 be connected to the spindle 8, while the handle on the in side of the door will be connected to the spindle 53. It will be understood, of course, that some usual key-controlled operative connection between the outer knob and the spindle 8 will be employed so that the doorv may be locked in the usual way.

9i indicates a spring-pressed stop projection lcarried by the end 9@ of the housing i and having its inner end operating in a groove (i9 formed in the bolt 6, this stop pin being to limit the outward movement of the bolt due to the expansive action of the spring i2. This stop pin Si is backed by a spring Q8 received in a recess in the portion 85 ofthe housing and the spring is returned in the position by a removable screw plug B1.

I claimz' l. A lock for a door comprising a spring-pressed latching bolt in said door, a spindle extending through the door, knobs for operating said spindle, a pinion on the spindle, a rack meshing with the pinion, a connection between the rack and the bolt which normally prevents backward movement of the b'olt relative to the rack, a feeler member exposed at the end oi the bolt, and means responsive to pressure applied to the ieeler to disrupt the connection between the rack and the bolt.

2. A lock for a door `comprising a spring-pressed latching bolt in said door, a spindle extending through the door, knobs for operating the spindle, a pinion on said spindle, a rack meshing with said pinion and having a downturned lip, two abutment members carried by the bolt ybetween which the lip is received, a feeler at the outer end of the bolt, and means responsive to pressure applied to the feeler to withdraw one of said abutment members from operative engagement with the lip.

3. A lock for a door comprising a spring-pressed latching bolt in said door, a spindle extending through the door, knobs for operating the spindle, a pinion on the spindle, a rack meshing with said pinion and having a downturned lip, a plate and an abutment pin carried by the bolt and between which said lip is received, and means for controlling the position of the abutment pin including a part exposed at the end of the bolt, said means being responsive to pressure applied to the exposed part to move the abutment pin into inoperative position out of engagement with the lip.

4. A lock for a door comprising a spring-pressed pressed latching bolt in said door, a spindle extending through the door, knobs for operating the spindle, a pinion on said spindle, a rack meshing with the pinion and having a laterally extending projection, means operatively connecting said projection to the bolt including a plate member and an abutment pin between which said projection is received, a spring acting on the abutment pin and tending to move it into inoperative position, a releasing pin extending axially of the bolt and having a cam portion normally engaging said abutment pin and holding it in its operative position, said releasing pin being movable relative to the bolt into an inoperative position, thus allowing said spring to move the abutment pin simultaneously into its inoperative position, whereby the bolt is free to move backwardly independently of the rack.

5. A lock for a door comprising a spring-pressed latching bolt in said door, a spindle extending through the door in the Aaxial line of the bolt, knobs for operating the spindle, a pinion on the spindle, a rack meshing with the pinion, operative connectionsbetween the rack and the bolt by which movement of the rack in either direction produces a movement of the bolt in a corresponding direction, instrumentalities carried by the bolt and having a portion exposedA at the end thereof and rendered operative by the application of pressure to said exposed portion to disrupt said connections, whereby the bolt is free to be moved backwardly against the action of its spring while the rack remains stationary.

6. A lock for a door comprising a spring-pressed latching bolt in said door, a spindle extending through the door in the axial line of the bolt, knobs for operating vthe spindle, a pinion on the spindle, a rack meshing with the pinion, and operative connections between the rack and the bolt by which movement of the rack in one direction will withdraw the bolt and in the other direction will move the bolt into locking position, a feeler exposed at theouter end of the bolt, and means responsive to pressure applied to the feeler to disrupt such operative connection.

'7. A lock for a door comprising a spring-pressed latching bolt in said door, a spindle extending through the door, knobs for operating the spindle, a pinion on said spindle, a rack meshing with said pinion and having a downturned lip, two abutment members carried by the bolt between which the lip is received, a feeler movably carried by the outer end of the bolt, and means rendered operative by movement of the feeler relative to the bolt to withdraw one of said abutment mem` bers from operative engagement with the lip.

8. A lock for a door comprising a spring-pressed latching bolt insaid door, av spindle extending through the door, knobs for operating the spindle, a pinion on the spindle, a rack-meshing with the pinion and having a laterally extending projection, two abutment members carried by the bolt and between which said projection is received, a feeler pivoted tothe end of the bolt, a spring acting on the eeler and normally holding it projecting beyond the bolt end, and means rendered operative by depressing the eeler to withdraw one of the abutment members from engagement with said projection whereby the' bolt may be retracted within theldoor while the rack remains stationary.

9. A door lock for a door comprising a springpressed latching bolt in said door, a spindle extending through thedoor, knobs for operating said spindle, a pinion on the spindle, a rack meshing with the pinion and operatively connected to the bolt, a eeler movably carried by the outer end oi the bolt, and means rendered operative by movement of the feeler relative to the bolt to disrupt said connection between the rack and the bolt. f

10. A lock for a door comprising a springpressed latching bolt in said door, a tubular housing in the door in which the bolt operates and by which it is guided, said housing having the same cross-.sectional shape as that ofthe bolt and fitting the latter, an auxiliary latch carried by the bolt and having interlocking engagement with the housing when the bolt is in latching position, which interlocking engagement prevents backward movement of the bolt regardless of whether the door is open or closed, a spindle, operative connections between the spindleand the bolt, and means to retract the auxiliary latch during the initial turning movement of the spindle in a direction Vto withdraw the bolt.`

11. A lock for a door comprising a springpressed bolt, a housing in the door in whichv said bolt operates, said bolt normally being in latching position but being movable 4forwardly beyond latching position into locking position, an auxiliary latch carried by the bolt andhaving interlocking engagement with the housing when the bolt is in latching position and having interlocking engagement with the striker plate in the door frame when the bolt is projected forwardly beyond the latching position into locking position, a spindle, operative connections between the spindle and the bolt, and means to retract the auxiliary latch during the initial turning movement of the spindle in a direction to withdraw the bolt from either locking position or latching position.

12. A lock for a door comprising a springpressed latching bolt, a housing in said door in which the bolt operates, an auxiliary latch carried by the bolt and having interlocking engagement with the housing when the bolt is in latching position, a spindle for operating the bolt, a pinion on the spindle, a rack meshing with the pinion and operatively connected to the bolt, a feeler carried by the bolt at its outer end, means rendered operative by the depression of the feeler to disrupt said connection between the rack and the bolt, and means also rendered operative by the depression of the feeler to retract the auxiliary latch.

13. A lock for a door .comprising a spring-` pressed latching bolt, a housing in the door in which the bolt operates, an auxiliary latch carried by the bolt and having interlocking engagement with the housing when the bolt is in latching position,a spindle for operating the bolt, a pinion on said spindle, a rack meshing with said pinion and having a downturned lip, two abutment members carried by the bolt between which the lip is received, a feeler carried by the bolt at its end, means rendered operative by depression of the feeler to withdraw one of said abutment members from operative engagement with the lip, and means also rendered operative by the depression of the feeler to retract the auxiliary latch.

14. A lock for a door comprising a springpressed latching bolt, a housing in said door in which the bolt operates, an auxiliary latch carried by the bolt and having interlocking engagement with the housing when the bolt is in latching position, a spindle for operating the bolt, a pinion on said spindle, a rack meshing with said pinion and having a downturned lip7 two abutment members carried by the bolt between which the lip is received, a feeler carried by the bolt at its end, a plurality of devices rendererd operative by depressing the feeler, one device operating to withdraw one of the abutment members from operative engagement with the lip and the other device operating to retract said auxiliary latch.

15. A lock for a door comprising a springpressed latching bolt, a housing in the door in which the bolt operates, said housing having a recess, an auxiliary latch carried by the bolt and normally occupying said recess when the bolt is in latching position, a spindle for operating the bolt, a pinion on said spindle, a rack meshing with said pinion and having a downturned lip, two abutment members carried by the bolt between which the lip is received, a feeler carried by the bolt at its outer end, and a plurality of devices rendered operative by movement of the feeler relative to the bolt, one device operating to withdraw one of said abutment members from op- 16. A lock for a door comprising a springpressed latching bolt in the door, a housing within the door having a shape to t the bolt and by which the bolt is guided, said bolt normally having a latching position but being movable backwardly into the housing, a. spindle for operating the bolt, a pinion on the spindle, a rack meshing with the pinion and having a down-turned lip, two abutment members carried by the bolt between which the lip is received, the front abutment member being movable from operative to inoperative position, a feeler exposed at the end of the bolt, an auxiliary latch carried by the bolt and having interlocking engagement with the housing when the bolt is in latching position, a releasing pin carried by the bolt and connected to the feeler, `means to move the auxiliary latch into inoperative position by movement of the releasing pin when the feeler is depressed, thereby permitting the bolt to be retracted within the housing, means to move the front abutment into its inoperative position when the feeler is depressed, thereby permitting the bolt to move backwardly independently of the rack, said auxiliary latch being held in its inoperaive position by the housing when the bolt is retracted, and means carried by the auxiliary latch and acting on the releasing pin to hold it in its retracted position While the auxiliary latch is in its inoperative position whereby the movable abutment willl be maintained in its retracted position until the bolt is returned to its latching position.

17. A lock for a door comprising a spring pressed latching bolt, a housing in the door in v which the bolt slides, said housing having a front and a rear recess, a spindle for operating the bolt, a pinion on the spindle, a rack meshing with the `pinion and having a down-turned lip, two abutment members carried by the bolt between Which the lip is received, the front abutment member being movable from operative to inoperative position, an auxiliary latch carried by. thel boltv and movable transversely thereof,

said auxiliary latch occupying one of the recesses in the housing when the bolt is in latching position and occupying the other recess when the bolt has been fully retracted by the spindle, a feeler exposed at the end of the bolt, a releasing pin connected to the feeler and slidable longitudinally of the bolt, means cooperating with the releasing pin to move the movable abutment into inoperative position when the releasing pin is moved by depression of the feeler, means to retract the auxiliary latch by such movement of the releasing pin whereby the bolt is free to move backwardly independently of the rack when the pressure is applied to the feeler, a stop pin carried by the bolt and a stop member cooperating with said stop pin to prevent complete backward movement of the bolt sufficient to bring the auxiliary latch into alinement with the rear recess tween which the lip is received, the front abutment member being movable from operative to inoperative position, an auxiliary latch carried by the bolt and movable transversely thereof, said auxiliary latch occupying the front recess in the housing when the bolt is in latching position and occupying the rear recess vwhen the bolt has been fully retracted by the spindle, a feeler ex` posed at the end of the bolt, a releasing pin connected to the feeler and slidable longitudinally of the bolt, means cooperating with the releasing pin to move the movable abutment into inoperative position when the releasing pin is moved by depression of the feeler, means' to retract the auxiliary latch by such movement of the releasing pin, whereby the bolt is free to move backwardly independently of the rack when the pressure is applied to the feeler, a stop pin carried by the bolt and av stop member cooperating with said stop pin to prevent complete backward movement of the bolt suicient to bring the auxiliary latch into alinement with the rear recess, and means cooperating with the retracted auxiliary latch to hold the releasing pin in its retracted position until the bolt again is moved forwardly to latching position, said stop being rendered inoperative when the bolt is retractedl by the spindle.

19. A lock for a door comprising a spring pressed latching bolt in said door, a spindle for operating the bolt, a pinion on said spindle, a rack meshing with said pinion and having a down-turned lip, a front and rear abutment member carried by the bolt between which the lip is received, a feeler movably carried by the outer end of the bolt, means rendered operative by movement of the feeler relative to the bolt to withdraw the front abutment member from operative engagement with the lip, thereby to permit the bolt to be retracted into the door while the rack remains stationary, and means cooperating with the housing to insure the retention of the retracted abutment member in its retracted position until the bolt has again moved forward into latching position.

20. A lock for a door comprising a spring pressed latching bolt, a housing in the door in which the bolt slides, said housing having a front recess and a rear recess, a manually operable spindle, a rack connected thereto for operating the bolt, normally operative connections between the spindle and the bolt, an auxiliary latch carried by the bolt and movable transversely thereof, said auxiliary latch occupying the front reces's in the housing when the bolt is in latching position and occupying the rear recess when the bolt has been fully retracted by the spindle, a feeler exposed at the end of the bolt, a releasing pin connected to the feeler and slidable longitudinally of the bolt, means cooperating with the releasing pin to disrupt the connections between the spindle and the bolt when said releasing pin is moved by depression of the` feeler, means to retract the auxiliary latch by such movement of the releasing pin whereby the bolt is free to move backwardly independently of the rack when pressure is applied to the feeler, a stop pin carried by the bolt, and a stop member normally held in operating position by the rack and cooperating with said stop pin to prevent backward movement of the bolt suicient to bring the auxiliary latch into alinement with the rear recess, said stop being rendered inoperative when the rack is manually moved by the spindle.

2l. A lock for a door comprising a springpressed latching bolt normally occupying a latch,- ing position but movable forwardly beyond latching position into a locking position, a housing in the door in which said bolt operates, said housing having the same cross-sectional shape as the bolt and fitting the latter and also having a recess, an auxiliary latch carried by the bolt, said latch, when the bolt is in latching position, having a locking engagement with the recess of said housing which prevents backward movement of the bolt but' which permits forward movement thereof both while the door is opened and while it is closed, a spindle, operative connections between the spindle and the bolt by which the bolt may be moved fromxlatching to locking position, and means actuated by the initial turning movement of the spindle in a direction to withdraw the bolt from either position to retract the auxiliary latch.

JOSEPH H. NHLLIGAN. 

